the PCI Bus
The BCI-2000 Unibus Adapter enables Unibus devices to be connected to
workstations supporting the PCI bus. The BCI-2000 supports both PIO
and DMA Unibus data transfers as well as providing support for all
four Unibus interrupt levels.
The BCI-2000 consists of a single slot PCI controller, a dual-width
Unibus cable adapter module, and an eight-foot shielded interconnect
cable. The PCI controller occupies a single PCI slot. The Unibus cable
adapter installs into the Unibus connectors A and B of an expansion
chassis or user's equipment, replacing a Unibus cable.
The BCI-2000 provides complete support for:
* Unibus PIO data transfers including read word, data-input-pause,
write word, and write byte.
* Unibus DMA data transfers including read word, write word, and
* All four Unibus interrupt levels: BR4, BR5, BR6, and BR7.
Provides a migration path. The BCI-2000 allows users of Unibus systems
to migrate to the new high performance PCI workstations and retain
their existing Unibus I/O devices without loss of function or
High performance. Unibus PIO and DMA data transfers occur at maximum
Unibus speeds -- throughput is limited only by the Unibus device.
Cost savings. The BCI-2000 provides users the choice of low cost, high
performance PCI workstations while retaining their existing
investments in Unibus hardware and software.
Easy to install. The BCI-2000 allows multiple I/O devices to be
connected to a workstation while occupying only a single PCI-slot.
Easy to maintain. The BCI-2000 executes a comprehensive set of
diagnostics to automatically verify module operation.
PIO Transfers The BCI-2000 supports the four types of Unibus PIO data
transfers including read word, data-input-pause, write word, and write
byte. The entire Unibus address space is available for access by a PCI
DMA Transfers The BCI-2000 provides full compatibility with the three
types of Unibus DMA data transfers, including word read, write word
and, write byte. Single and multiple data transfers are supported.
Interrupts The BCI-2000 passes Unibus interrupts to the host for
service if interrupts are enabled by the host and the interrupts are
higher priority than the priority established under software control.
The BCI-2000 stores the 8-bit interrupt vector in an internal register
that is referenced by the host to determine the interrupt service
Unibus Termination The BCI-2000 provides Unibus termination for one
end of the Unibus. The user must ensure the Unibus is terminated at
the end of the Unibus within the expansion chassis or the user's
Unibus Parity Unibus parity signals PA and PB are terminated but
otherwise not supported by the BCI-2000.
The BCI-2000 is not supported under existing OpenVMS, Ultrix, or OSF/1
operating system software and requires software drivers to support the
features offered bu the BCI-2000. Consult our factory for more
Physical Dimensions PCI controllerSingle width card, 6.875 inches by
4.2 inches (17.46 cm by 10.67 cm) Unibus Cable AdapterDual-width
Unibus module, 5.s inches by 2.3 inches (13.s cm by 5.8 cm.) Cable
Length8 ft. Electrical BCI-2000-A3.8 amps @ 5.0 volts (+/- twelve
volts not used) Bus Loading1 dc load, 2 ac loads Bus Drive
Capability19 additional dc loads Environmental Operating Conditions:
Temperature 5° to 50° C (41° to 122° F) Relative Humidity20% to 80%
noncondensing Storage Conditions: Temperature-40° to 66° C (-40° to
150°F) Relative Humidity10% to 95% noncondensing
BCI-2000-CAPCI controller without memory, Unibus cable adapter, 8-foot
cable and user manual. BCI-2000-AAPCI controller with 256KB memory,
Unibus cable adapter, 8-foot cable and user manual. BCI-2000-BAPCI
controller with 1MB memory, Unibus cable adapter, 8-foot cable and
Digital, Unibus and OpenVMS are trademarks of Digital Equipment
UNIX is a trademark of X/Open Company Ltd..
We reserve the right to improve our products without notice.
75 Gateway Boulevard, Cottage Grove, Oregon 97424 USA
Tel: (541) 942-3610 Fax: (541) 942-3640
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